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trap

sewage system

Learn about this topic in these articles:

drainage system

  • construction of apartment buildings
    In construction: Plumbing

    …a semicircular reverse curve, or trap, which remains constantly filled with water and prevents odours from the drainage system from escaping into occupied spaces. Immediately downstream from each trap is an opening to a vent pipe system, which lets air into the drainage system and protects the water seals in…

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